Electrical SLDs & Cable Sizing
Quick Intro about Service ( S2 )
Electrical SLDs & Cable Sizing Precision Engineered for Solar & Industrial Projects
Our expert electrical design service includes custom-built Single Line Diagrams (SLDs), optimal cable sizing, and loss calculations ensuring your project’s electrical system is safe, efficient, and grid-compliant. Whether you’re planning rooftop, ground-mounted, or hybrid solar plants, our layouts are tailored to your load profiles, inverter specs, and panel configurations.
We follow IS/IEC standards and integrate every component circuit breaker, SPDs, combiners, and grounding into a clear, ready-to-execute diagram. From LV to HT design, we provide solutions that reduce site execution errors, improve system performance, and speed up approvals from DISCOMs, clients, or consultants.
- Custom Single Line Diagram (SLD)
- Accurate Cable Sizing Calculations
- Voltage Drop & Loss Report
- Earthing & Lightning Protection Layout
- Protection Device Selection
- Submission-Ready PDF & DWG Files
Have Any Questions?
+91 82006 76107
Who Needs This Service ( S3 )
Who Requires This Service?
Electrical precision is a must whether you’re designing a utility-scale system, rooftop solar plant, or industrial HT connection. Our service is designed for professionals who need electrical plans that are safe, efficient, and compliant in order to proceed with their projects without any delays.
Solar Installers & EPC Companies
For rooftop, ground-mounted, and hybrid solar systems, highly precise SLDs, appropriately sized cables, protection details, and IS-compliant documentation will guarantee quicker DISCOM approvals, fewer site errors, and easier commissioning.
100% Design engineers and electrical advisors
By hiring reliable professionals to handle crucial computations like cable sizing, fault current, and voltage drop, you may improve the caliber of your designs, speed up turnaround, and free up your time for other important electrical tasks.
Project Developers & Asset Owners
Minimize risk and maximize long-term performance by validating load capacities, earthing design, protection settings, and cable routing before installation—ensuring your project is both safe and cost-optimized.
DISCOM & Tender Applicants
Submit technically robust, IS/IEC-aligned electrical documentation that meets grid compliance standards, improving your credibility and increasing the chances of winning government tenders or commercial solar projects.
Key Deliverables ( S4 )
Important Deliverables for Electrical Safety and Compliance
Our deliverables are more than simply documentation; they are design tools that are ready for implementation and are designed to minimize risk, maximize cost, and secure approvals from investors, DISCOMs, and EPC partners. Technical accuracy and commercial usability are balanced in the creation of each product.
Single Line Diagram (SLD) Compliant with IS
Well created SLDs with clear technical mapping of all necessary electrical components, including inverters, protective devices, AC/DC panels, and metering locations. Every schematic is tailored to fit rooftop, ground-mounted, or hybrid solar systems while adhering to IS/IEC standards. Perfect for on-site execution, engineering evaluations, and DISCOM submissions.
Precise Cable Dimensioning and Voltage Drop Estimation
carefully determined cable diameters based on variables such as voltage drop restrictions, insulation type, load current, cable run length, and ambient temperature. In addition to being technically correct, the findings are also cost-effective, avoiding excessive expenditure on cable acquisition. IS/IEC standards support every calculation to guarantee electrical efficiency, lifespan, and safety.
Execution-Ready Cable Schedule
A structured, professional table that includes detailed cable specs such as size, type, insulation class, length, source-destination points, and circuit IDs. Designed to help procurement teams place accurate orders and enable field technicians to execute installation efficiently. Comes in editable formats for real-time updates during the project.
The Software and Tools We Use
In order to guarantee technical accuracy, grid compliance, and precision in all power system studies, we use industry-standard licensed software. Real-time simulations, intricate fault analysis, and very reliable grid behavior forecasts are made possible by these instruments.
Process Workflow (Timeline Style) ( S6 )
Our 4-Step Method for Providing Precise SLDs and Cable Dimensions
We use an engineering-driven methodology to guarantee that your electrical or solar project receives accurate, IS-compliant documentation that is delivered on schedule and prepared for use.
Compiling the requirements
To start design, we gather important project inputs like load distribution, site layout, component datasheets (protection devices, inverters, etc.), and system capacity.
Drafting Electrical and SLD Designs
Using conventional methods, our team creates an initial Single Line Diagram (SLD) and sizes cables, accounting for safety limitations, derating, and voltage drop.
Technical Evaluation and Enhancement
Every electrical design is examined internally for practical execution feasibility, fault current limits, and conformity with IS/IEC regulations. Changes are made in response to comments.
Delivery of the Final Report
For DISCOM clearance, EPC execution, or customer submission, we provide IS-compliant SLDs, cable sizing sheets, and a thorough cable schedule in PDF and editable forms.
Case Study / Sample Output ( S7 )
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Why ( Service Name ) Matters ( S8 )
Why URJA Is Your First Choice for Cable Sizing & Electrical SLDs
Accuracy and code compliance are essential in the fast-paced solar and electrical EPC business. At URJA, we provide cable schedules and single line diagrams that are both execution-ready and approval-friendly by fusing technical precision, engineering know-how, and in-depth understanding of IS/IEC standards. Our deliverables streamline your process from design to commissioning, whether you’re powering a rooftop plant or competing in a DISCOM procurement.
Completely IS/IEC Compliant Results
The most recent IS and IEC standards, including IS 732, IS 1255, IEC 60364, and others, are closely followed in all of our electrical single line diagrams (SLDs) and cable size documentation. This guarantees confidence during third-party audits or inspections, quicker DISCOM approvals, and smooth integration with your safety procedures.
Cost and Performance Optimization
To choose the most effective cable sizes, we carry out thorough voltage drop and derating calculations, guaranteeing long-term energy performance while avoiding expensive overengineering. For both commercial and industrial solar projects, this leads to a maximum return on investment, safe operation, and simplified procurement.
Prepared for Tender Submissions and DISCOM
The format of our electrical documentation conforms to the normal requirements of CEIG, DISCOM, and tender assessment. You are given plug-and-play files that boost your chances of winning in competitive bidding settings, including specific conductor data and correct load schedules.
Rapid Reaction Time
We guarantee a delivery window of three to five working days with a committed staff of electrical engineers and drafters. Without sacrificing quality or compliance, we also provide expedited processing and assistance for last-minute bids or project deadlines.
Ideal for Solar EPCs, Consultants, and Developers
Whether you're managing a 100 kW rooftop project or a multi-megawatt ground-mounted solar plant, our service fits seamlessly into your workflow. We provide tailored outputs that match the scale, layout, and regulatory requirements of your system.
End-to-End Coordination with Your Team
Our project coordinators and design engineers stay in close contact with your site engineers, procurement team, and consultants. This collaborative approach ensures that our designs are easily executable, correctly interpreted on-site, and aligned with your project's bill of materials and timelines.
FAQ Section ( S10 )
12 Frequently Asked Questions (FAQs)
An SLD is a simplified representation of the electrical network that shows how power flows from the source (solar or grid) to all electrical loads and devices like inverters, DBs, and meters. It’s essential for system approvals and safe execution.
Accurate cable sizing ensures minimal energy loss, voltage drop, and overheating resulting in efficient performance, cost savings, and long-term system safety.
Yes. All our electrical designs follow IS 732, IS 1255, IS 3043, IS 14255, and IEC 60364 standards meeting DISCOM and safety authority requirements.
We typically deliver within 3–5 working days, depending on project complexity. Priority delivery is available for urgent tenders or execution requirements.
Absolutely. Our documents are pre-formatted and structured as per DISCOM norms, making them ready for CEIG approvals, tender submissions, and audits.
Yes. Our engineering process includes full voltage drop analysis and considers derating based on temperature, conduit type, and cable grouping.
We usually require a basic layout, inverter specs, load data, system capacity (in kW), and cable route lengths. Our team will guide you step-by-step.
Yes. We provide customized electrical documentation for residential, commercial, and utility-scale solar PV systems both rooftop and ground-mounted.
Yes. We offer up to two rounds of free revisions for design alignment based on site or client feedback. Further changes can be handled upon request.
Yes. Our deliverables include a detailed cable schedule with specifications, lengths, and clear source-to-destination mapping for each circuit.
We provide DWG (AutoCAD), PDF, and Excel formats ready for submission, print, or on-site use.
Definitely. Our engineers are available to coordinate over call or email for technical clarifications, ensuring the design is practical and easy to implement.
Benefits of Choosing URJA ( S10 )
The Reasons URJA Is the Best Option for Electrical Design Services
In addition to SLDs and cable size, URJA provides precision-engineered, approval-ready paperwork that fits your execution objectives, site conditions, and financial constraints. Our experience guarantees seamless approvals, cost optimization, and faultless implementation whether you’re an EPC firm, consultancy, or contract applicant.
Time-saving engineering accuracy
Our electrical designs adhere closely to IS/IEC standards, guaranteeing precise voltage profiles, protection coordination, and load flows. By doing away with uncertainty during site execution, this speeds up procurement, lowers rework, and improves communication between engineering and on-site teams.
Cost-effectiveness without sacrificing quality
We size cables smartly—balancing derating, voltage drop, and fault levels—to avoid overspending and copper losses, ensuring technically sound and cost-efficient performance.
DISCOM-Ready Documentation & Tender
Our SLDs, cable schedules, and load calculations align with DISCOM, L1 tender, and IEC norms—helping you clear approvals faster and win more EPC or net metering bids
Customized Assistance for Commercial, Industrial, and Solar Projects
Electrical needs vary by project we tailor solutions for factories, commercial sites, ground-mounted arrays, and rooftop solar, adapting to your system size, setup, and site constraints.
Blog / Knowledge Center (SEO + Value) ( S11 )
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9. Client Testimonials
What Our Clients Say
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Are You Prepared to Boost with Accuracy ?
Make sure your electrical documentation is correct, compliant, and ready for execution whether you’re planning a rooftop solar installation, submitting a tender, or optimizing an industrial system. Collaborate with URJA to remove uncertainty and guarantee smooth design and installation coordination. Let’s get your project underway right now.
To get a quote or arrange a free technical consultation, use the link below.